• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

CAT 329 E - Track pressure relief valve

John C.

Senior Member
Joined
Jun 11, 2007
Messages
12,865
Location
Northwest
Occupation
Machinery & Equipment Appraiser
All the occurrences happened the same number of times and they all appeared the last time at the same number of hours? You might check on the hours when the modifications were made on the machine. My guess would be something is hooked into the supply side of what ever powers those functions or there is a short to ground on a wiring harness that has those three wires.
 

simonsrplant

Senior Member
Joined
Feb 10, 2014
Messages
554
Location
Alberta CANADA
Occupation
Heavy Duty Off Road RSE
...After operating it for awhile the machine loses its hydraulic speed and strength...
May be worth checking main pump and system relief pressures hot against cold.
Weak relief(s) could contribute to slow or weak functions throughout the whole machine.
 

heymccall

Senior Member
Joined
Feb 19, 2007
Messages
5,352
Location
Western Pennsylvania
The track pressures are regulated by four relief valves, one for each direction, on each side. So, a track pressure relief valve would typically only affect travel in one direction, on one side.
Definitely need a much better description than what was provided.
 

ms0115

Senior Member
Joined
Mar 3, 2014
Messages
336
Location
Ethridge, TN
Working with the monitor on the machine pump 1 and pump 2 are showing the same kind of pressures. When working the tracks the pressures are staying similar and it shows the pressure switching to the on off position. When traveling straight the pressure switch stay in off position is this normal?
 

Cmark

Senior Member
Joined
Jan 2, 2009
Messages
3,176
Location
Australia
Not sure what pressure switches you're referring to but I reiterate my earlier questions.

Which functions do you perceive as being faster/slower. Fwd L, Fwd R, Rev L, Rev R, a combination or random?
Does the problem change if you work another service, eg boom, swing etc. whilst travelling?
Do you have pressure gauges in your possession?
 

ms0115

Senior Member
Joined
Mar 3, 2014
Messages
336
Location
Ethridge, TN
The functions all seems fine at present. But will get it up to temperature and under load tomorrow. It's the last option on the monitor said straight travel pressure sw
 

ms0115

Senior Member
Joined
Mar 3, 2014
Messages
336
Location
Ethridge, TN
This machine has not been in inventory very long; It was bought from an auction. Trying to run down another issue and was wondering if I could get a wiring diagram for the fuel water separator circuit. The light is on, the filters were changed. Started tracing wires and someone had cut the wires in the loom and tied them together. I am assuming it was an attempt to make the light go out. Do to the weather I have not had the opportunity to run down the other issues that we had discussed. Will update on the progress.
 

Nige

Senior Member
Joined
Jun 22, 2011
Messages
28,984
Location
G..G..G..Granville.........!! Fetch your cloth.
Didn't I send you the Electrical Schematic(s) some time back when you first posted..?
IIRC there were apparently two documents that covered your S/N and I sent you both of them. See post #20 on Page 1.
The fuel filter/wter separator circuit will be in them.
 

M Ali

New Member
Joined
Dec 4, 2018
Messages
1
Location
Canada
I am an issue with turning speed on cat 329e l. I need to look at the wiring diagram and wiring schematic. Can someone please send me these two items. Thanks.
 
Top